is 14749 (2000): proforma for analysis of unit rate of
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IS 14749 (2000): Proforma for Analysis of Unit Rate ofUnderground Excavation by Cyclic Drilling and Blasting [WRD23: Measurement and Cost Analysis of Works For River ValleyProjects]
IS 14749 : 2000
?Lfivhw
Indian Standard PROFORMA FOR ANALYSIS OF UNIT RATE OF
UNDERGROUND EXCAVATION BY CYCLIC DRILLING AND BLASTING
ICS 93.020;17.020
0 BIS 2000
BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110092
January 2000 Price Group 3
Cost Analysis and Cost Estimates Sectional Committee, WRD 19
FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Cost Analysis-and Cost Estimates Sectional Committee had been approved by Water Resources Division Council.
Underground excavation by cyclic drilling and blasting is very often resorted to during construction of River Valley Projects. As very large areas are involved in such operations, it becomes necessary that a proper methodology is available for rate analysis of the same. This would be helpful in integrating the economics of
the project.
For the~purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)‘. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
IS 14749 : 2000
Indian Standard
PROFORMA FOR ANALYSIS OF UNIT RATE OF UNDERGROUND EXCAVATION BY CYCLIC DRILLING
AND BLASTING
1 SCOPE
This standard lays down proforma for analysis of unit rate of underground excavation by cyclic drilling and blasting. This standard does not include provisions for underground !ining.
2 CLASSIFICATION
For case of comparison of unit rates of various underground excavations, lhe following classification for underground excavation may be adopted:
a) Based on geolcgical consideration:
1) Underground excavation in competent rock
2) Underground excavation in incompetent rock
b) Based on method of excavation adopted:
1) Pull face
2) Heading and benching
3) Multi-drift.
Unit cost for underground excavation by adopting heading and benching method may be the average of unit cost of heading and unit cost of benching. The average will be weighted average depending upon the area of heading and benching.
3 TECHNICAL INFORMATION
The following technical information would be helpful in framing the unit rate of underground excavation:
1)
2) 3)
4)
5)
6)
7)
8)
9)
10)
Name of the project.
Layout plan of the project.
Location with plan and longitudinal section of
the underground component.
Purpose of the underground excavation.
Construction agency:
i) Departmental or contractor
ii) Name of department/contractor
Shape of the underground work (circular, horse shoe, elliptical, vertical walled with arch roof, vertical excavation of various shapes, etc).
Excavation size of the underground component (excavated dimensions to the pay-line).
Type of final lining.
Location plan and longitudinal section of adits and shafts.
Description of alignment including mention of
bends, transitions, approach adit/tunnel.
11)
14
13)
14)
15)
16)
17)
Type of rock bored (igneous, sedimentary or
metamorphic) and physical properties such as
compressive strength, abrasive value and modulus
of elasticity.
Orientation of excavation with respect to dip,
strike joint pattern.
Description of rock cover, depressions and khuds crossing over the underground cavity along its
alignment.
Physical defects of rock formations (joints, faults,
etc).
Ground water conditions, locations and quantity
of seepage water at various periods of the year.
Inflammable and obnoxious gases, if encountered
(brief description).
Methods adopted for tackling underground
excavation (full face, heading and benching,
multiple drifting, pilot tunnel/shaft, forepoling,
providing double steel ribs and invert struts etc):
i>
ii)
iii)
iv)
v)
vi)
Reaches of competent rock strata,
Reaches of incompetent rock strata (sheared
and fractured),
Reaches with inadequate rock cover and
adverse ground water conditions,
Reaches showing rock distress,
Reaches of bad rock strata which may lead
to causing break through conditions, and
Any other adverse geological conditions.
18) Equipment at each underground heading :
9
ii)
iii)
iv)
Drill jumbo
Type
Overall dimensions
Number of drills/booms
Motive power
Drilling machines
(hydro-booms, ladder drilling system with
fast rock drills, other drills)
Number and type.
Drill steel and drill bits (a brief description)
Mucking machine : Make, model and
capacity, number of
machines
IS 14749 : 2000
v) Haulage equipment
Locos (diesel/ : Number, make, model electrical) and capacity
Mine cars : Rubber tyred : Model and capacity
carriers
vi) Ventilation
a) Ventilation duct : Diameter and type
b) Main blowers : Make, model, type, capacity and spacing
vii) Pumping arrangements (underground)
19)
20)
21)
Number of pumps - main/feeder
Type of pumps : Type and capacity
Spacing of pumps
Length, size and nature of pipelines - main/ feeder
viii) Supporting arrangement
ix) Communication arrangement inside and outside
x) Instruments for monitoring
xi) Location and lead of dump yard from portal
Air supply - Installed capacity of compressors, pipe size.
Water supply - Capacity of tank, pipe size, length, etc
Electrification
Main supply voltage
Transformer details
Lighting voltage
Excavation data (in reaches of competent rock
strata)
i) Type of strata for drilling and blasting:
a)
b) c) 4 4 f? 8)
h)
Average number of drill holes and size of holes per round/cycle,
Type of cut holes pattern,
Number and size of cut holes,
Average depth of drill holes,
Average actual advance,
Type of explosive and detonators used,
Quantity of explosive used for round/
cycle, and
Explosive factor (kgcum)
ii) Time cycle
a) Moving drill jumbo up to - (h/min) the face and drilling cycle
b) Average drilling rate - (cm/min)
c) Loading cycle, removing- (h/min) drill jumbo from the muck pile, scaling down loose rocks and mucking out
f) Time for secondary blasting - (himin)
22)
23)
g)
3
k) ml
4
P)
Time for installation - (h/min) support system (shot- creting, rockbolting, structural steel support, lagging, backfilling)
Description of support
system including spacing, etc
Average time lost due to hold ups/derailments in case rail mounted equip- ment is used
Average cycle time - (h) Average advance/ - (m or m3) excavation in one cycle Overall advance/ - (m or m3) excavation in a month
Percentage of overbreak of the excavation up to payline
Date of commencement and completion of underground excavation
Monthly progress from the date of start of excavation to completion of excavation as per the following format:
Year Month Progress Underground excavation
24)
25)
26)
27)
(m or m3) -condition
Incentive payment - a brief description
schemes for under- ground crews and results obtained (if
any) Industrial disputes - a brief description (if any) and their effect on
progress
Safety arrangements including first aid, medical and rescue operations.
Accidents during underground excavation
Fatal ~accidents -
Major accidents -
Reasons of accidents - -
28) Geological forecast of - strata and that actually
obtained during under-
ground excavation
29) Lessons learnt
No. of persons dead
No. of persons disabled
A broad split up be
given
Current forecast
A brief description
outlining the major
variations be given
4 PROFORMA FOR ANALYSIS OF UNIT RATE OF COST FORUNDERGROUND EXCAVATION
4.1 The proforma recommended for use in the
analysis of unit rate of underground excavation is as
given in Table 1.
3
IS 14749 : 2000
Table 1 Proforma for Analysis of Unit Rate of Cost for Underground Excavation (Clause 4.1)
V&me of rock excavated per cycle =
No. ofcycle per day (depending upon cycle time) =
Volume of rock excavated per day =
A CYCLE~OF OPERATlONS
Si Item of Operation
NO.
a)
b)
C)
d)
e)
n
6)
h)
Survey and marking profile/holes
Positiomngof jumbo and drilling
Chargmg and blasting
Defuming
Scaling
Mucking
Mapping
Average time for shotcreting, rock bolting/rib erection and backfill concreting
Total cycle time =
6 CHARGES
B-1 Labuur Charges*:
i)
ii)
iii)
iv)
v)
Vi)
Vii)
Foreman/Supervtsor (No. x Wage)
@ Rs per day
Blaster (No. x wage)
@ Rs per day
Electrician (No. x wage)
‘8 Rs per day
Helperto Electrician/Blaster
@IRS per day
Erldurs (No. x wage)
@ Rs per day
No. of Working Hours
Rs
Rs
Rs
Rs
Rs
Rs
Rs
Add for Indirect charges of labour =
7 ourI labour charges : Rate of labour per cum =
Rs
k
* Other than those employed for operation and maintenance ofequipment as the same are covered under unit rate cost ofequipment.
B-2 Machinery Charges :
Sl No. (1) 1)
ii)
iii)
iv)
v)
Equipment
(2)
Drilling Equipment
(Drill Jumbo/Jack hammer/ ._......,..._...............)
Mucking Machine
(Muckedwheel loader/ .,,,_._............,........)
Hauling Equipment
(locos/dumpers/ . . . . . . . . ..__....._..........)
Mucking Equipment
(Minecats/ . . . . .._...._..._._..........)
Number
(3)
Working hours ~Total working
per cycle hours per cycle
(4) (9
Unit rate cost
per hour, Rs
(6)
Amount
in Rs
(7)
Miscellaneous Equipment
(Dozer/loader/excavator/ . . . . . . . ..__.................)
Total machinery charges per cycle: Quantity ofrock excavated per cycle
Rs =
Total machinery charges Rate per cum = =
Quantity of rock excavated Rs
3
IS 14749 : 2000
Table 1 (Continued)
B-3 Material Charges
B-3.1 Drilling C’ross-sectional areaot iunnei No. ofholes required per &ce Depth ofholes Totai drilling length
Cost ofdrilling accesa,ries
=
= 100,say L
= IOOL
Item No. Regd. Cost of Life Cost/metre
a) Shank adapter b) Drill steel/ Drifter rod
c) Couplings
d) Bll
Total cost permetre ofdrillmg = Rs x, say
Total cost ofdrilling per cycle
Quantity of rock excavated per cycle = _..,__.__, cum
Rate for drilling per cum = Total cost of drilling (I 00 Lx)
Quantity of rock excavated
R-3.2 Blasting
i) Cost per cycle yelatine ANF’J PVC pipes
=Rs 1OOLx
= Rs = Rs = Rs
TO&d =Rs
ii) Cost ofdetonators/fuse coils =Rs
iii) Cost ofconsumables = connectingwires, cordex fuse, blasting cable, etc - per cycle =Rs
(i) + (ii) + (iii) Hence rate per cum T.
-- 0uantlty of rock excavated
= Rs
B-3.3 Timber for Supports, Not Rleasured and Accounted for Separately Rate per cum, Lumpsum -Rs
B-3.4 Miscellaneous Supplies
B-4
Such as wire ropes: manila ropes, v-clamps, rubber gloves, shackles and artificial respiraiors, etc rate per cum,
lumpsum =Rs
Total material charges-per cum [(B-3.1 + B-3.2 + B-3.3 + B-3.4)]
= Rs. + Rs. .+ Rs. + Rs =Rs
Charges for Venlilation Untt rate cost ofblower perworking hour =Rs No. ofworking hours of blowers per cycle =
Total charges ufblower per qclc = KS C:ost ofventilatlon duct including erection charges per cycle = Rs (Total cost of vent pipes and :lccessoriesMo. ofcycles in full length of tunnel) Total ventilation charges per cycle =Rs Quantity of rock excavated per cycle =
Total ventilation charges Hence rate ner cbm = -
B-5 Shop Charges
=Rs
i) ii) Iii) iv)
v)
Quantity of rock excavated
Machine shop including fourdry and emithy, lumpsum = Rs Structural shop, Steel metal shop, Air and water pipe shop, Carpentaryshop. Total shop charges per cum
lumpsum = Rs lumpsum = Rs lumpsum = Rs lumpsum = Rs
= Rs
4
IS 14749 : 2000
Table 1 ~Concluded)
B-6 Electrical Material Charges per cum Covering
i) Electric cables/wires ii) Electrical consumables
iii) Electrical accessories iv) Booster/Step-down transformer
= Rs
B-l i) Railway trdck and accessories
charges per cum lumpsum = Rs
ii) Road charges per cum lumpsum = Rs
B-8 Water supply system charges per cum lumpsum = Rs
B-9 Surveying charges per cum lumpsum = Rs
(Control survey and~day-to-day)
B-IQ Comtnunica~lon charges percum to mclude walkie telephones, etc
lumpsum = Rs
C ABSTRACT OF~CHARGES
I
2
3
4
5
6
7
8
9
IO
Labourcharges
Machinery charges
Marenal charges
Ventilation charges
Shop charges
Hectrical materials charges
Track/road charges
Water supply charges
Surveying charges
Communication facilities
=Rs
=Rs
=Rs
=Rs
=Rs
= Rs
=Rs
=Rs
=Rs
=Rs
Total =Rs
C-l Add for
C-l .I Anc~llanes mcldentals,
I Provision of:
i) Labour and stafrquarters
ii) Service roads
iii) Electric powersupply
iv) Water supply system
v) Sanitation system
vi) Dramage system
vii) Other amenities including first aid, medical facilities and safety arrangements and rescue operation
2 Maintenance/Operation ofitems mentioned above
3 Supervisory’works establishment
C-l.2 Quality control
C-l .3 Contingencies
NOTE Item C-l.1 to C-l .3 above need to be accounted for and suitable allowance made.
C-l .4 Overhead and pr0fi.t
This would includeestablishment, office stationery,gcneml tools and plant, staffcars, their running and maintenance, insurance, workman’s compensation, statutory benefits, telephone and tele- communication facilities, interest, liabilities on borrowings from the owner and bank guarantee charges
NOTE - All items mentioned above shall include depreciation, installation, operation, repairs and mamtenance, mobilization and demobilization and dismantling ofmachinery where used. All items of labour mentioned above shall include indirect statutoT and other
benefits payable to the labour. _.
5
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This Indian Standard has been developed from Dot: No. WRD 19 (210).
Amend No.
Amendments Issued Since Publication
Date of Issue Text Affected
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